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Old 09-16-2018, 02:54 PM   #1
Join Date: Feb 2018
Location: NYC
Posts: 7
Check engine light wiring

Ok I have 1986 325E with a 95 m3 s50 obd1 swap. How do I wire up check engine light. On the c101 plug, pin 12 is empty. On the x20 there’s pin 8 [grey wire]. Do I pull the cluster and tap into green/white wire with pin 8 from x20?

Also how do I wire up diagnostic port. Is it pin 16 [white/black] from c101 to x20 pin 17 x20?. With both things wired up, will it allow me to scan for codes through diagnostic port from e36?
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